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close this bookThreaded Joints - Course: Techniques of fitting and assembling component parts to produce simple units. Trainees' handbook of lessons (Institut für Berufliche Entwicklung, 25 p.)
View the document(introduction...)
View the documentPreliminary Remarks
View the documentHints on Labour Safety
View the document1. Purpose of Threaded Joints
View the document2. Selected Types of Bolts and Screws
View the document3. Selected Types of Nuts
View the document4. Selected Types of Locking Devices for Bolts and Screws
View the document5. Selected Types of Washers
View the document6. Types of Threaded Joints
View the document7. Stresses in Threaded Joint
View the document8. Tools
View the document9. The Technological Steps of Making Threaded Joints
View the document10. Undoing Threaded Joints

3. Selected Types of Nuts

Nuts are made of the same material as bolts and screws and can have the same kind of plating.

Precise bolt-and-nut joints can only be achieved when they are made of the same materials, grade of material and have the same type of coating.

Hexagon nuts

Used in structural steel engineering and mechanical engineering. There are hexagon nuts of different sizes of ISO metric coarse and fine threads and of flat or wide shape. The cap nut is a special design. Cap nuts provide caps on bolted or screwed joints. They are used as a safety precaution or for better looks. Cap nuts keep the thread clean.


Figure 8. Nuts

1 hexagon nut, 2 cap nut

Knurled nuts and wing nuts

Used for producing detachable joints of component parts by hand, without the use of tools.


Figure 9. Nuts

1 knurled nut, 2 wing nut

Slotted nuts and nuts with two holes

These nuts are used mainly for electrical components where space is limited and the joint is not easily accessible.


Figure 10. Nuts

1 slotted nut, 2 nut with two holes

What conditions must be satisfied by the materials of which bolts, screws and nuts are made?
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Give uses of knurled nuts and wing nuts.
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